MRCOOL® 18k DIY 5th Generation Mini-Split Air Handler & Condenser 230VV w/ 25ft Pre-Charged Quick Connect® Line Set & EZPRO® Cable DIY-18-HP-WM-230D25-O
Summary
The 5th Generation MRCOOL® DIY® 18K BTU 22.5 SEER Ductless Heat Pump System provides powerful, efficient heating and cooling for spaces up to 800 sq. ft., designed specifically for easy DIY installation. With its pre-charged 25-foot QuickConnect® line set filled with R-454B refrigerant, the system eliminates the need for vacuuming or professional assistance, making setup quick and cost-effective. The included DIYPRO® cable replaces traditional electrical conduit, offering enhanced durability against weather, wildlife, and outdoor wear, while the corrosion-resistant Gold Fin® Condenser ensures long-lasting performance, even in coastal environments.
Control your comfort effortlessly with multiple options, including the wireless remote with Follow Me technology, the SmartHVAC app for Apple and Android devices, or hands-free voice commands via Amazon Alexa and Google Assistant. The system is packed with user-friendly features like Dry Mode for humidity control, an energy-saving Timer function, and Auto Mode for consistent temperature maintenance. After a power outage, the unit automatically restores your previous settings, and the anti-mildew function helps prevent excess moisture buildup for cleaner, healthier air.
Backed by industry-leading warranties—including a limited lifetime warranty, 7-year compressor coverage, and 5-year parts protection—this 22.5 SEER system delivers reliable, energy-efficient performance year-round. Combining smart technology, coastal-ready durability, and hassle-free installation, the MRCOOL® DIY® 18K BTU system is the perfect solution for customizable, professional-grade comfort in any home.
What's Included
-
Indoor Units MRCOOL® 18k DIY 5th Generation Mini-split Air Handler 230v w/ DIYPRO® Cable
- Outdoor Unit MRCOOL® 18k DIY 5th Generation Mini-Split Condenser 230v w/ 25ft DIY Quick Connect® Line Set
- Wireless Remote Controls
- Installation Manual
- User’s Manual
- Manufacturer Warranty
Warranty
- 7 year compressor limited warranty
- 5 year parts limited warranty
Warranty Inquiries are handled through MRCOOL at https://mrcool.com/contact/
Technical Information
DIY-18-HP-WMAH-230D25-O (Wall Mount Air Handler)
BRAND NAME |
MRCOOL |
SERIES |
DIY 5th gen Single-Zone Mini-splits |
MODEL |
DIY-18-HP-WMAH-230D25-O |
GTIN |
00840255587044 |
UPC |
840255587044 |
SHORT DESCRIPTION |
MRCOOL® 18k DIY 5th Generation Mini-split Air Handler 230v |
LONG DESCRIPTION |
The 5th Generation MRCOOL® DIY® 18K BTU Ductless Heat Pump Single Zone Mini-Split Air Handler is a powerful and efficient solution for heating and cooling spaces up to 800 sq. ft. Designed with a true DIY installation in mind, this system eliminates the need for special tools or professional assistance, making setup fast, simple, and cost-effective. One of the standout features is the pre-charged 25-foot DIY® QuickConnect® line set, which comes pre-filled with R-454B refrigerant. This means there’s no need for vacuuming, cutting down on installation time and costs. Additionally, the included DIYPRO® cable removes the need for electrical conduit, providing added durability and protection against outdoor elements and wildlife. Controlling your system is effortless with multiple options to fit your lifestyle. Adjust settings using the wireless remote, the SmartHVAC app for Apple and Android devices, or hands-free voice commands through Amazon Alexa and Google Assistant. Engineered for long-lasting performance, the Gold Fin® Condenser in the outdoor unit offers superior corrosion resistance, especially beneficial in coastal environments. For added comfort, the Follow Me function on the remote allows the air handler to monitor and adjust airflow based on the remote’s location, ensuring even temperature control. Dry Mode helps maintain a comfortable indoor environment by reducing excess humidity and condensation buildup. Backed by industry-leading warranties—including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty—the 5th Generation MRCOOL® DIY® is built for reliability. Enjoy smart features, easy installation, and dependable year-round comfort with this innovative ductless mini-split system. |
FEATURE LIST |
|
TONNAGE |
1.5 |
VOLTAGE (V) |
208/230 |
PHASE |
1 |
CYCLE |
60 |
MAX FUSE BREAKER (A) |
15 |
MIN CIRCUIT AMPACITY (A) |
3 |
MOUNT TYPE |
Wall |
COLOR |
White |
MAX COVERAGE AREA |
800 sqft |
DECIBEL RATING LOW (DBA) |
19 |
DECIBEL RATING HIGH (DBA) |
54.5 |
NUMBER OF SPEEDS |
5 |
OSCILLATION |
Yes |
LIQUID LINE SIZE |
1/4 |
SUCTION LINE SIZE |
1/2 |
FILTER TYPE |
Reusable |
AUXILIARY HEATER INCLUDED |
No |
AUXILIARY HEATER AVAILABLE |
No |
FAN ONLY OPTION |
Yes |
QUIET MODE |
Yes |
AUTO COOL |
Yes |
WIFI COMPATIBILITY |
Yes |
APP COMPATIBILITY |
Yes |
WORKS WITH IOS |
Yes |
WORKS WITH ANDROID |
Yes |
REMOTE CONTROL INCLUDED |
Yes |
UL LISTED |
Yes |
ETL LISTED |
Yes |
ENERGY STAR CERTIFIED |
Yes |
AHRI CERTIFIED |
Yes |
REGISTERED WARRANTY |
Extended Limited Lifetime* |
BASE PARTS WARRANTY |
5 |
BASE COMPRESSOR WARRANTY |
7 |
HAS BATTERIES |
Yes |
CONTAINS ELECTRONICS |
Yes |
CONTAINS CHEMICALS |
Yes |
CONTAINS AEROSOL |
Yes |
CONTAINS COMPRESSED GAS |
Yes |
PROPOSITION 65 WARNING |
Yes |
NET DEPTH (IN) |
8.9 |
NET HEIGHT (IN) |
13.19 |
NET WIDTH (IN) |
42.52 |
NET WEIGHT (LBS) |
35.49 |
GROSS DEPTH (IN) |
17.68 |
GROSS HEIGHT (IN) |
14.29 |
GROSS WIDTH (IN) |
46.73 |
GROSS WEIGHT (LBS) |
49.6 |
Install Manual |
Remote Manual |
Outdoor Model Number:DIY-18-HP-C-230D25-O
BRAND NAME |
MRCOOL |
SERIES |
DIY 5th gen Single-Zone Mini-splits |
MODEL |
DIY-18-HP-C-230D25-O |
GTIN |
00840255586962 |
UPC |
840255586962 |
SHORT DESCRIPTION |
MRCOOL® 18k DIY 5th Generation Mini-Split Condenser 230v |
LONG DESCRIPTION |
Introducing the new 5th Generation MRCOOL® DIY® 18K BTU 22.5 SEER Ductless Heat Pump Single Zone Mini Split Condenser, a game-changer for home climate control. Designed for straightforward installation, it requires no specialized tools or professional help, making it an excellent choice for spaces ranging from 500-750 sq. ft. The system includes a pre-charged 25-foot QuickConnect® line set filled with R-454B refrigerant, streamlining installation by eliminating the need for vacuuming. The DIYPRO® cable adds extra protection against weather, animals, and yardwork damage, replacing the need for traditional electrical conduit. Managing your home's temperature has never been easier. You can adjust settings using the included remote, the SmartHVAC app for Apple and Android devices, or voice commands via Amazon Alexa and Google Assistant. The Gold Fin Condenser enhances durability, providing excellent corrosion resistance for coastal environments. Designed for efficiency and comfort, this system offers multiple features. The Timer function helps control energy use, while Auto mode maintains your preferred temperature without manual adjustments. After a power outage, the unit automatically restores previous settings, and the anti-mildew function prevents excess moisture buildup inside the air handler. Built for long-term reliability, the 5th Generation MRCOOL® DIY® Mini Split comes with an industry-leading warranty, featuring a limited lifetime warranty, plus 7 years on the compressor and 5 years on parts. With its innovative design, simple installation, and dependable performance, this system delivers hassle-free comfort for your home. |
FEATURE LIST |
|
SEER2 |
22.5 |
EER2 |
13.7 |
HSPF2-4 |
11.5 |
HSPF2-5 |
8.5 |
TONNAGE |
1.5 |
COOLING CAPACITY (BTU) |
18000 |
HEATING CAPACITY (BTU) |
18000 |
VOLTAGE (V) |
208/230 |
PHASE |
1 |
CYCLE |
60 |
MAX FUSE BREAKER (A) |
20 |
MIN CIRCUIT AMPACITY (A) |
18 |
COLOR |
White |
ZONE CAPACITY |
1 |
REFRIGERANT TYPE |
R-454B |
REFRIGERANT VOLUME (OZ) |
44.8 |
DECIBEL RATING (DBA) |
58.5 |
INVERTER |
DC |
LINE SET LENGTH |
25 |
MAX LINESET LENGTH (FT) |
98.4 |
LIQUID LINE SIZE |
1/4 |
SUCTION LINE SIZE |
1/2 |
COMPRESSOR MOTOR TYPE |
Rotary |
AUXILIARY HEATER INCLUDED |
No |
AUXILIARY HEATER AVAILABLE |
No |
FAN ONLY OPTION |
Yes |
QUIET MODE |
Yes |
AUTO COOL |
Yes |
WIFI COMPATIBILITY |
Yes |
APP COMPATIBILITY |
Yes |
WORKS WITH IOS |
Yes |
WORKS WITH ANDROID |
Yes |
UL LISTED |
Yes |
ETL LISTED |
Yes |
ENERGY STAR CERTIFIED |
Yes |
AHRI CERTIFIED |
Yes |
REGISTERED WARRANTY |
Extended Limited Lifetime* |
BASE PARTS WARRANTY |
5 |
BASE COMPRESSOR WARRANTY |
7 |
HAS BATTERIES |
Yes |
CONTAINS ELECTRONICS |
Yes |
CONTAINS CHEMICALS |
Yes |
CONTAINS AEROSOL |
Yes |
CONTAINS COMPRESSED GAS |
Yes |
PROPOSITION 65 WARNING |
Yes |
NET DEPTH (IN) |
13.46 |
NET HEIGHT (IN) |
26.5 |
NET WIDTH (IN) |
35.04 |
NET WEIGHT (LBS) |
93.48 |
GROSS DEPTH (IN) |
18.11 |
GROSS HEIGHT (IN) |
29.53 |
GROSS WIDTH (IN) |
40.55 |
GROSS WEIGHT (LBS) |
114.2 |
Certifications
ADD EXTRA 1/4"-1/2" INSTALLATION KITS?
-
MRCOOL DIY R-410A Charged Line Set 1/4"-1/2" Mini Split Quick-Connection for DIY 9K, 12K & 18K with Connection Wires (Select Size)
Regular price $205.00Sale price $205.00 Regular priceUnit price per$140.00
Line covers
-
12FT PVC Decorative Line Set Cover Kit for Ductless Mini Split Air Conditioners, Heat Pumps, and Inverters systems.
Regular price $73.00Sale price $73.00 Regular priceUnit price per -
16.5FT Brown PVC Decorative Line Set Cover Kit for Ductless Mini Split Air Conditioners, Heat Pumps, and Inverters systems.
Regular price $89.00Sale price $89.00 Regular priceUnit price per
Brackets and Concrete Pads
-
18"x40"x4" Plastic Equipment Mounting Pads – Lightweight, Durable Base for HVAC Units & Outdoor Installations
Regular price $69.00Sale price $69.00 Regular priceUnit price perSold out -
Heavy-Duty Mini Split Ground Stand with Load Capacity up to 500LBS, Condenser Bracket for 9000-36000 BTU Ductless Air Conditioners and Heat Pump, Inverter Systems
Regular price $129.99Sale price $129.99 Regular priceUnit price per -
Heavy-Duty Mini Split Ground Stand with Load Capacity up to 770LBS, Condenser Bracket for 9000-60000 BTU Ductless Air Conditioners and Heat Pumps, Inverter Systems
Regular price $169.99Sale price $169.99 Regular priceUnit price perSold out -
Heavy-Duty Mini Split Wall Bracket with Load Capacity up to 480LBS, Condenser Bracket for High BTU Ductless Air Conditioners and Heat Pump, Inverter Systems
Regular price $59.97Sale price $59.97 Regular priceUnit price per -
Mini Split Compressor Bracket for 6,000 - 28,000 BTU
Regular price $39.97Sale price $39.97 Regular priceUnit price per
We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map

IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
SMS Delivery Notifications
If you opted into SMS notifications, we may send you order updates or delivery reminders by text message. Message frequency may vary. Message and data rates may apply. Text STOP to opt out. Text HELP for assistance.
For more details, see our Privacy Policy.
Cooper & Hunter
DETAILED PRODUCT BOOKLETS FOR THIS PRODUCT:
Olivia Series Booklet
Multi-Zone Booklet
Specification Table
Quick-Start Guide
Installation Manual
General Manufacturing Information
Rebates




